How to get Point Filtering working

Describes how to activate Point Filtering mode to experience classic unfiltered textures.

Requirements

You will need:
Deus Ex GOTY
(https://www.gog.com/game/deus_ex)
Deus Ex D3D10 Renderer
(https://kentie.net/article/d3d10drv/)
Notepad or Notepad++ (preferred)
(https://notepad-plus-plus.org/downloads/)
Keyboard (to type)
https://www.amazon.com/AmazonBasics-Matte-Keyboard-QWERTY-Layout/dp/B07WJ5D3H4/ref=sr_1_1?dchild=1&keywords=amazon+basics+keyboard&qid=1599503682&sr=8-1

complexsurface.fx (unfiltered world textures)

Navigate to your Deus Ex Directory
Enter the System folder
Enter the D3D10 Folder

Open complexsurface.fx using the word program of your choice
Use CTRL+F or scroll down to find line 194
under //diffuse

//Diffuse
float4 diffuse = texDiffuse.SampleBias(sam,input.tex[0],LODBIAS);

Alter this line so it reads:

float4 diffuse = texDiffuse.SampleBias(samPoint,input.tex[0],LODBIAS);

This will enable filtering on world textures (walls, ceilings, geometry etc) but not on characters or models (guns, boxes, trashcans, any other world assets that are not geometry.)

gouraudpolygon.fx (Make models have point filtering)

One more line to change.

Open "gouraudpolygon.fx" and find line 77.

"float4 diffuse = texDiffuse.SampleBias(sam,input.tex,LODBIAS);"

change it to
"float4 diffuse = texDiffuse.SampleBias(samPoint,input.tex,LODBIAS);"

Save and close.
Now boot up the game and choose the D3d10 Renderer , enjoy!

Now your world models and world textures will have unfiltered textures.

Comparison Screenshots

Normal Filtering

Point filtering

Point filtering with detail textures disabled

[Aldarith]

What is the line / command?

[MightyFineIncredible]

To be fair, I edited the INI beforehand with this guide. Afterward used the preferences menu option which toggles it on/off

[Aldarith]

Interesting - I wasn't able to do it that way but I would appreciate any reports.

[MightyFineIncredible]

*Forgot to mention in the previous comment, capping FPS in Nvidia Control Panel should cut down game freeze when pressing ESC.

[MightyFineIncredible]

Alternatively, you should be able to enable point filtering in-game by typing 'preferences'. It should be in the render options of D3D10 :)
D10's performance issues on modern drivers can be minimized by opening Nvidia Control Panel -> 3D settings - Deus Ex -> cap framerate to <120, set latency to ultra low and set performance to max power. And remove FPS cap from any other limiters like GMDX

This should remove stuttering or at least alleviate it and framerate issues!

[Taberone]

If using D3D10 then to stop the issues with alt-tabbing I think you need to enable pre-caching
Type "preferences" in chat (backspace to delete the "say" part) and go to the Renderer Settings
Then enable pre-caching and see if that helps

[Aldarith]

Unsure which factor is the cause, but definitely related to video setup.

Try different drivers or stop tabbing out. Personally I went for option 2

[Blinker City Expressway]

its fine when in windowed though however when in window it freezes for a bit when i open a menu

[Blinker City Expressway]

whenever i tab out of the game it permanently goes blank until i restart the game. is this the d3d10 drivers fault or just a problem with modern deus ex

[Aldarith]

Wholesome family-friendly cup of tea